Free UK postage
Beck, B.A. and Wilson, W.L. (1987). Karst Hydrogeology: Engineering and Environmental Applications; Sinkholes and Environmental Impacts of Karst,. A A Balkema.
Mather, John D. (ed.)(2004). 200 Years of British Hydrogeology. London: Geological Society Special Publication 225. 393pp. 1st edition. Hardback. Geological Society of London.